Patent GB-655703-A (GB)
Title: Improvements in and relating to belt conveyors
IPC: B65G23/00
Filed: 1948-09-27
Abstract: 655,703. Endless belt conveyers; hoppers. LEECH, L. A., and MILLARS MACHINERY CO., Ltd. Sept. 27, 1948, No. 25180. [Class 78 (i)] [Also in Group XXIV] The driving drum of a belt conveyer is intermittently driven by an oscillatable one-way means located within the drum and actuated by a driving shaft upon which the drum is freely rotatable. As shown in Fig. 1, a driving drum 1 of a belt conveyer 14 is freely mounted on a constantly rotated shaft 2 carrying a cam 9. The cam 9 engages a roller 8 carried by a pair of curved arms 7 mounted on a spindle 18 for oscillation by the cam, and the arms 7 are connected by a pair of links 11 to a pin 12 on a pair of arms 10 free on the shaft 2. The pin 12 carries a pawl 13 biassed by gravity or by a spring to engage ratchet teeth 4 formed on the inside of the drum 1 so that reciprocation of the arms 7 by the cam 9 causes the pawl 13 to impart an intermittant motion to the drum 1. The stroke of the arms 7 may be reduced by a stop 16 engaging an arm 17 on the spindle 18. The stop 16 is slidably mounted for adjustment in a tube 118 secured to the fixed framing 15 by means of a pin 20 on the stop which engages a helical slot in the tube 118 and may be held in notches in the slot by a spring 19. The spindle 18 is supported from a unit 6 supported on a fixed plate closing the end of the drum, the teeth 4 being provided only at the end of the drum. The cam 9 may have two or more lobes. Two driving units may be mounted one at each end of a single drum the shaft 2 being formed in two halves disconnectable at a point between the two mechanism so that each mechanism may be withdrawn through the adjacent end of the drum, or alternatively a single shaft may be employed, the surface of the drum being capable of removal to provide access to the mechanisms. As shown in Fig. 7, the conveyer may be supported below a hopper 22 provided with an adjustable gate 22a and side plates 22b. The framework of the conveyer includes side angle bars 27 ; the lower angles 27 on one side are supported by channels 30 hinged thereto and to the framework 34 supporting the hopper, and the upper angles 27 on the opposite side are supported by links 35 from the frame 34. The links 35 may be disconnected at 31 so that the conveyer is supported by links 36 in an inclined position for removal of the belt 14. The upper run of the belt 14 may be supported by flanged idler rollers. A pair of conveyers arranged side by side to deliver material from a pair of hoppers or from a single hopper provided with two compartments may be driven by a single shaft such as 2 and may be supported by means similar to those shown in Fig. 7. The two conveyers may run in opposite directions from spaced outlets in the hoppers to a central single conveyer at right angles to both the delivery conveyers, the shafts for the two driving drums being aligned and connected by a coupling. The drives to the two drums may be independently controlled by means such as are shown in Fig. 1. A series of conveyers may deliver sand from a series of side by side hoppers, the shafts 2 of the conveyers being connected by flexible couplings to be driven from a single shaft, and each conveyer may be suspended by means similar to those of Fig. 7.